Improvement in bench-dogs



D. M. BIRDSEYE.

Bench-Dog.

No. 205,717. Patented July 9,1878.

M0222 ewea. 4 [722/622/0).

N4 PETERS, PHDTO-LXTHQGRAPHER, WASHINGTON o C UNITED STATES PATENTQFFIGE.

DANIEL M. BIRDSEYE, OF SYRACUSE, NEW YORK.

IMPROVEMENT IN BENCH-DOGS.

Specification forming part of Letters Patent N0. 205,717, dated July 9,1878; application filed December 15,1877.

To all whom it may concern:

Be it known that l, DANIEL M. BIRDSEYE, of Syracuse, Onondaga county,and State of New York, have invented a certain new and usefulImprovement in Bench-Hooks; and I declare the following to be such afull and clear description of the same as will enable those skilled inthe art to which it appertains to make and use the same.

This improvement relates to the class of bench-hooks having theirsustaining and operating devices on the under side of a workbench, andbeing so constructed as to operate freely in adjusting to hold thethickest plank or thinnest veneer with sufficient firmness to dress downor smooth off with a jack or finishin g-plane, as desired by theoperator.

To this end my invention consists of a flatheaded hook, made preferablyof steel, pro vided with teeth, and connected at its center with acircular stem or shank extending down through an aperture in the top ofthe bench, and a frame-plate with operating devices, the plate beingattached to the under side of the bench by screws, the construction ofthe various parts being more fully set fort-h hereinafter.

In the accompanying drawing, forming a part of this specification, likeletters therein indicating corresponding parts, Figure 1 is a sideelevation of my bench-hook applied, and Fig. 2 an end view showing theoperating parts.

The letter A represents the front edge of the top of a work-bench withthe hook B connected to the circular stem or shank D pass in g downthrough the top and through the bench-plate O, secured underneath. Thebenchplate is constructed with a case or frame consisting of two parts,each having a semicircular concave, through which, when in position, thecircular stem passes, the semicircular concaves forming a shell or casefor the circular stem. One part of the case is cast onto the plate atright angles to its face, and is provided with a groove extending itsentire length, into which the other part, which is movable, isshouldered. The semicircular concave is made longer on the shoulder end,in order to allow the movable part to act as a binding strap or bar, thebinding device consisting of a circular cam upon its outer side,operated by a cam-lever pivoted thereon by a bolt passing through thestationary and movable parts, the bolt being retained in place by acommon set-nut.

In order to facilitate the raising or lowering of the hook, I insertbetween the two parts of the case or shell a small piece of fiat rubber,which acts as a spring when the camlever is raised, releasing the hook.

The movable clamp, strap, or bar forms a lever, having its fulcrum atthe point where it is shouldered to the stationary part, and, incombination ith the operating-cam and cam lever, forms a binding deviceof great strength and durability.

It will be observed that the shape of the stem and its case allows, whenpressure on the cam-lever is removed, the hook to play up or downfreely, as desired, while a slight pressure on the cam-lever retains itat any desired point of its length, thus providing an adjustment capableof securely holding or stopping the thickest plank or a very thinveneerin the operation of planing.

All of the parts of my improved benchhook are made of metal and combinedin a compact body, so as to be light and at the same time durable.

To apply my device a hole is made through the top of the bench ofsufficient diameter 'to allow the stem to move freely, and thebenchplate secured in position underneath. It is then ready for use.

The advantages in using my hook are its easy and rapid adjustment, itsadaptability to any style of work-bench without marring or disfiguringthe top, and the fact that when used on a portable out-door bench thehook can be removed and placedin a chest under lock and key with othertools, without removing the operating devices, which are out of sghtunderneath the bench.

Having thus fully described my invention, I claim- The bench-plate 0,adapted to be secured on the under side of a work-bench, the hook B,with circular stem D, with each other, and the lever clamping bar orstrap E, operated by a cam and lever, substantially as herein specified.

D. M. BIRDSEYE. Witnesses:

S. J. BILLING-TON, H. O. LANDGRAFF.

